Look around at most of the custom tanks around and I'd be amazed if any had a seal as pristine as that. You have only one bubble that's actually pretty amazing. Evey tank I've had no matter how nice they look have had plenty of bubbles. I think I was told once that as the seals cure and tighten up they can actually create those marks.  
 
My 225 was black silicone and I worried even more lol. I could see the joint lighten in colour as I filled the tank and the pull on the seam increased.  
 
That tank looks very well built. 
		
	
		
		
		
		
			
		
		
		
		
	
		
		
	
	
	 |